"With the initial read, Francisco answered all of the questions and was really aggressive wanting to get down to first base," Pirates manager Clint Hurdle said.
"He answered all of the questions and went through the protocol [head athletic trainer] Todd [Tomczyk] puts in place, and then once he got down there I think [first-base coach] Nick [Leyva] was talking to him, and he was not working the way he needed to be working."
Eric Fryer entered the game as a pinch-runner and later scored Pittsburgh's first run on an RBI groundout by Jordy Mercer.
Pat James is a reporter for MLB.com based in Atlanta. This story was not subject to the approval of Major League Baseball or its clubs.